Question

A doctor attends five patients in 45 minutes. How many hours he has to work if he has to attend 50 patients?

• A. 6 hours
• B. 6.5 hours
• C. 7 hours
• D. 7.5 hours

Answer 1

Answer: (D)

7.5 hours

Answer 2

Let's first calculate the time the doctor takes to attend one patient.
The doctor attends 5 patients in 45 minutes, so for 1 patient, the time taken is:
$\frac{45}{5}=9$ mintues per paitent.
Now, to attend 50 patients, the total time required is:
$50\times9=450$ minutes
Convert 450 minutes into hours:
$\frac{450}{60}=7.5$ hours
Thus, the doctor needs to work 7.5 hours to attend 50 patients.
The correct option is (D):7.5 hours